“难达到”的英语？

对水解酶间隔作用作完全分析是很难达到的.A complete analysis of the compartmentation of hydrolases is difficult to achieve.这些要求很难达到.These requirements are going to be difficult to meet.他很难达到目的, 因为他这人太拘泥细节了.He'll hardly reach his aim, be...